Why does the rate of most reactions decrease over time?
a decrease in reactant concentration reduces the frequency of successful collisions.
a decrease in temperature reduces the average kinetic energy of the particles.
an increase in product concentration interferes with the effectiveness of the catalyst.
an increase in pressure of the system reduces the movement and energy of particles.

A decrease in reactant concentration reduces the frequency of successful collisions.

Explanation:

Rate = - d[Reactants]/d(time).

Rate = k[Reactants]ˣ,

where, k is the rate constant of the reaction.

x is the no. of moles that the rate of the reaction depends on.

So, it is clear that the rate of the reaction is directly proportional to the concentration of the reactants.

A decrease in reactant concentration reduces the frequency of successful collisions.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

the objects have the same charge is correct.

nathan lee